Abstract: Composite material comprising—one or more heat-activatable free-radical initiators selected from the group consisting of organic peroxides and/or initiators having labile carbon-carbon bonds and particles which have a core-shell structure and the core of which comprises one or more magnetic materials, while the shell comprises silicon dioxide.

Abstract: Strengthened thermoplastic materials use fly ash or cinders as extenders. The extended materials use fly ash or cinders that preferably contain no more than about 2% by weight of moisture. The thermoplastic materials are preferably foamed and extruded to form extruded closed cell foam articles, for example a window blind slat, shutter louver, shutter stile, or shutter frame. Thermoplastic materials formed with the fly ash or cinders can also be formed into non-foamed products or into pellets for use in later extruding to form products.

Abstract: Provided are surface-treated fine particles which, when added to coatings for the production of films, exhibit excellent reactivity with respect to organosilicon compounds and resins that are matrix components of the coating films, and thereby allow the films to exhibit excellent performance. Oligomer-modified fine particles include inorganic oxide fine particles having a surface modified with an oligomer, the oligomer being derived from a metal alkoxide represented by Formula (1): RnM1(OR?)z-n (1) wherein M1: one or more elements selected from Si, Ti, Zr and Al; R and R?: one or more groups selected from alkyl groups of 1 to 8 carbon atoms, aryl groups and vinyl groups; n: an integer of from 0 to (z?2); and z: the valence of M1. The oligomer has a polymerization degree of 3 or more. The oligomer has a weight average molecular weight in the range of 1000 to 10000.

Abstract: The present invention provides a composition for treatment, the composition comprising dispersed in water (i) a fluorinated compound, (ii) a potassium or lithium silicate and (iii) an acrylic polymer. The invention further provides a method of treating substrates with the composition.

Abstract: Disclosed is a method of manufacturing soundproofing composite, and a soundproofing composite manufactured by the aforementioned method, the method comprising preparing a mixture by dissolving PP resin and nanoclay in a solvent; and volatilizing the solvent from the mixture. According to the present invention, the composite is manufactured by dissolving PP resin and nanoclay, to thereby realize great stiffness and soundproofing properties.

Abstract: A silicone rubber composition contains: (A) 100 parts by weight of a dimethylpolysiloxane sequestered at both ends of the molecular chain thereof by a dimethylvinylsiloxy group; (B) 5 to 100 parts by weight of a dry silica, treated by a vinyl group-containing organosilicon compound and having a specific surface area of 50 m2/g or more; (C) 5 to 100 parts by weight of a copolymer of dimethylsiloxane and methylhydrogen siloxane; (D) platinum or a platinum compound as a curing agent in an amount of 1 to 1,000 ppm as platinum atom to the total amount of component (A) and component (C); and (E) triazole or a derivative of triazole, in an amount of 1 to 10,000 ppm to the total amount of (A) component and (C) component.

Abstract: The invention provides a polymer based material comprising a water binding agent present in an amount sufficient to chemically and/or physically absorb and/or adsorb water to prevent degradation of the polymer. The invention also provides a polymer based material comprising a plasticizer or organic solvent as well as a multi-component material or composite including materials encompassing a second polymer and/or an active agent. The invention further provides a pharmaceutical composition comprising the aforesaid polymer based material, which can be used for treatment of bone, cartilage and/or periodontal defects.

Abstract: A styrene based resin composition having a low linear thermal expansion coefficient and high formability, a formed article thereof, and an optical element made from the formed article are provided. The formed article is produced by forming a styrene based resin composition containing a styrene based resin and silica particles, wherein the number average particle diameter of primary particles of the silica particles is 0.5 nm or more and 40 nm or less, and the content of the silica particles is 40 percent by volume or more and 75 percent by volume or less relative to a total of the styrene based resin and the silica particles.

Abstract: Use of an inosilicate in a polymer composition to accomplish a headspace emission of all volatiles together of said polymer composition of equal or below 120 ?gC/g.

Abstract: Disclosed herein is a flame retardant composition comprising sulfonated polyolefin and a SO2-scavenging material and/or a flame retardant material that is not a sulfonated polyolefin. Also disclosed is a flame-resistant composite comprising a host material in which is incorporated sulfonated polyolefin as a flame retardant composition. Further disclosed are methods for producing the flame retardant composition and flame-resistant composites.

Abstract: Provided is a composite material which can be preferably used as alternative seal materials to asbestos seal materials or as a heat dissipation sheet with excellent thermal conductivity. The composite material comprises: (1) an inorganic filler-containing material containing an inorganic filler and any of the following: a polyimide film, a polyimide varnish consisting of a polyamide acid solution, an incompletely-imidized and self-standing polyimide precursor film obtained by drying a polyamide acid solution, a polybenzimidazole film, a varnish consisting of a polybenzimidazole solution, a polyazomethine film, a mixed film consisting of a polyimide resin and a polybenzimidazole resin, a mixed varnish consisting of a polyamide acid solution and a polybenzimidazole solution, a mixed film consisting of a polyimide precursor and polyazomethine, a polybenzoxazole film, etc; and (2) a molding consisting of any of expanded graphite, organic fiber and inorganic fiber.

Abstract: A composition comprising a fluid, and a material dispersed in the fluid, the material made up of particles having a complex three dimensional surface area such as a sharp blade-like surface, the particles having an aspect ratio larger than 0.7 for promoting kinetic boundary layer mixing in a non-linear-viscosity zone. The composition may further include an additive dispersed in the fluid. The fluid may be a thermopolymer material. A method of extruding the fluid includes feeding the fluid into an extruder, feeding additives into the extruder, feeding a material into the extruder, passing the material through a mixing zone in the extruder to disperse the material within the fluid wherein the material migrates to a boundary layer of the fluid to promote kinetic mixing of the additives within the fluid, the kinetic mixing taking place in a non-linear viscosity zone.

Abstract: Thermoplastic elastomer mixture which comprises at least one thermoplastic elastomer TPE, with the exception of a thermoplastic polyurethane TPU, and at least one filler from the group of precipitated silica, or precipitated silicate or carbon black. The thermoplastic elastomer mixtures are produced by, in a first step, mixing at least one filler selected from the group of precipitated silica, or precipitated silicate or carbon black, and at least one thermoplastic to give a masterbatch and, in a second step, mixing the masterbatch with at least one thermoplastic elastomer, with the exception of a thermoplastic polyurethane TPU. The thermoplastic elastomer mixture can be used in injection-molded items.

Abstract: Disclosed are a wholly aromatic liquid crystal polyester resin compound and a preparation method thereof. The disclosed wholly aromatic liquid crystal polyester resin compound comprises a wholly aromatic liquid crystal polyester resin having a high melting point, and an inorganic filler having a high thermal conductivity. In addition, the disclosed wholly aromatic liquid crystal polyester resin compound can be prepared by using a twin screw extruder having a barrel temperature of 350 to 450° C.

Abstract: This invention provides an effect pigment-containing, water-borne base coating composition comprising water-dispersible acrylic polymer particles (A) and effect pigment (B), the water-dispersible acrylic polymer particles (A) being obtained by emulsion polymerization of a radical-polymerizable unsaturated monomeric mixture including an amido-containing, radical-polymerizable unsaturated monomer having at least two radical-polymerizable unsaturated groups per molecule, and the effect pigment (B) being contained at a pigment weight concentration (PWC) within a range of 15-50%.

Abstract: The present invention relates to phosphorus-containing triazine compounds of the formula (I) and (III) and to the polymers obtainable from the water-eliminating polycondensation of a compound of the formula (II), and to the use thereof as flame retardants. [(A-H)+]m[Mm+(HPO42?)m]??(III-1), [(A-H)+]m[Mm+(P2O74?)m/2]??(III-2).

Abstract: A method for producing a polymer nanocomposite, includes: after expanding an interlayer space of a layered inorganic compound using an organic onium salt, immobilizing a radical polymerization initiator having a group represented by formula (1) on an interlayer surface of the layered inorganic compound via a covalent bond; and carrying out surface-initiated radical polymerization in a monomer from the immobilized radical polymerization initiator. Preferably, in the radical polymerization initiator having the group represented by the general formula (1), at least one of X1 to X3 in the formula is a chlorine atom, or R1 in the formula is a C1-25 alkylene group or a C2-25 alkenylene group optionally interrupted by an oxygen atom or an ester group and optionally substituted by a phenyl group: R1 represents a C1-25 alkylene group, a C2-25 alkenylene group, a C5-8 cycloalkylene group, or a C6-12 arylene group.

Abstract: The invention relates to a rubber mixture, in particular for pneumatic vehicle tires, more particularly for the inner liner of a pneumatic vehicle tire, seat belts, belts and hoses. The rubber mixture is characterized by the following composition: 30 to 100 phr of at least one halobutyl rubber, 0 to 70 phr of at least one other diene rubber, 5 to 100 phr of at least one dry mixture compound containing at least 25% of at least one delaminated aluminohydrosilicate modification, the delaminated aluminohydrosilicate modification having a two-layer grid, 10 to 100 phr of at least one carbon black with an STSA surface as defined according to ASTM-D 6556 of from 10 to 60 m2/g and a DBP number defined according to ASTM-D 2414 of from 50 to 160 mL/100g, 3 to 20 phr of at least one mineral-oil softener, and other additives.

Abstract: There is provided an artificial marble that includes antimicrobial substance, wherein the antimicrobial substance comprises less that about 0.002% (dry weight) of the artificial marble composition.

Abstract: A flexible or rigid intumescent material for fire protection applications. The intumescent material includes inorganic fibers, intumescent material, and a char strength enhancer that is different from the intumescent material and binder. The intumescent material exhibits a high expansion ratio and char strength, without substantial shrinkage, in response to elevated temperatures normally encountered during a fire.

Abstract: A biodegradable resin composition is provided. More particularly, a biodegradable resin composition for a core of a drain board, which has excellent extrusion productivity and thus improves productivity by improving physical properties, for example, reducing contractibility and elasticity recovery, according to original characteristics of a biodegradable resin without degradation in biodegrability of the biodegradable resin by mixing the biodegradable resin with an additional material for improving processibility in suitable amounts, a core of a drain board using the same, and a method of manufacturing a drain board. The biodegradable resin composition is prepared by mixing 5 to 60 parts by weight of calcium carbonate, 1 to 10 parts by weight of a thermoplastic resin, and 0.

Abstract: Provided is a transparent pressure-sensitive adhesive agent convertible into an adhesive agent that allows adherends to be instantly fixed to each other, allows the adherends to be reattached to each other, is excellent in processability such as being able to be cut into a sheet shape, is not peeled from the adherends even when exposed to a high-temperature atmosphere such as one in a fire, and has such transparency as to hardly impair the designs of the adherends. The transparent pressure-sensitive adhesive agent convertible into an adhesive agent has pressure-sensitive adhesive property before being sintered, and has adhesive property after being sintered.

Abstract: The disclosure provides a melt processible theromoplastic composition, comprising a major proportion of a base polymer comprising a first melt processible thermoplastic polymer having a first Fedor's solubility parameter and a first viscosity; and a combination of a carrier polymer and a surface modifying additive, the carrier polymer comprising a second melt processible thermoplastic polymer which has a second Fedor's solubility parameter that is at least about 2.5 (J/cm3)1/2 lower than the first Fedor's solubility parameter, and a second viscosity, the carrier polymer being adhered to the surface modifying additive, and wherein the first viscosity is at least about 10 times the second viscosity.

Abstract: The roller chain comprises inner link plates, a bush, outer link plates, a connecting pin, and a roller. Each of the chain components has a zinc-iron alloy ground film formed on an iron-based base material by impact zinc plating and a first coating film formed by using a water-based rust preventive paint including zinc, nitrate, and an organic compound having a mercapto group other than a mercapto group-containing silane coupling agent. Then a second coating film is formed on the first coating film by using the top coat paint comprising a pigment, sodium silicate, and an acrylic emulsion or a polyurethane water-based composition.

Abstract: A blend of nanocomposites is disclosed, with a polyolefin nanocomposite preferably serving as a continuous phase and a polyamide nanocomposite preferably serving as a discontinuous phase. The exfoliated nanoclay in both nanocomposites contributes stiffness, toughness and flame retardancy to the blend. Other optional ingredients include conventional essentially halogen-free flame retardants, intumescent essentially halogen-free flame retardants, and other typical polymer compounding additives. The compound can be processed as a thermoplastic into any practical article needing stiff, tough, and flame retardancy properties.

Abstract: What is described is a transparent polyamide-imide based on one or more different imido-dicarboxylic acids (AB) or derivatives thereof, and cycloaliphatic diamines (C) comprising 6 to 24 carbon atoms, wherein the imido-dicarboxylic acids (AB) or derivatives thereof are selected from the group of imido-dicarboxylic acids (AB) having the following structural formulas: wherein: ASL=(CH2)5-11, phenylene, (ylomethyl)phenyl, bis(ylomethyl)benzene, cyclohexanediyl, (ylomethyl)cyclohexyl, bis(ylomethyl)cyclohexane, cyclopentanediyl, (ylomethyl)cyclopentyl, bis(ylomethyl)cyclopentane, R?OH, O-alkyl, O-aryl, Cl, NH-ASL-COOH, Br, O—(CO)-alkyl, O—(CO)-aryl, R1=H, methyl, ethyl, propyl, with the provision that the ring can be substituted once or twice, and, with double substitution of the ring, the two substituents can be selected from the group, but may be different, and also moulding compounds based thereon, a method for production, and uses.

Abstract: Contemplated compositions and methods for sealing cementitious material includes the step of contacting a portion of the cementitious material with a concrete sealing composition, wherein the composition comprises swellable polymers that can form a moisture adaptive barrier in the material, a silicate component that can react with free lime in the material to form CSH in the presence of a catalyst, and a water miscible silane that can react with silica in the material to form polysiloxanes.

Abstract: The invention concerns a process for the preparation of a hardening accelerator composition by reaction of a water-soluble calcium compound with a water-soluble silicate compound and a process for the preparation of a hardening accelerator composition by reaction of a calcium compound with a silicon dioxide containing component under alkaline conditions, in both cases the reaction of the water-soluble calcium compound with the water-soluble silicate compound being carried out in the presence of an aqueous solution which contains a water-soluble comb polymer suitable as a plasticizer for hydraulic binders. The invention concerns also a composition of calcium silicate hydrate and comb polymer, its use as hardening accelerator and for the reduction of the permeability of hardened compositions.

Abstract: A plastic part, especially a bearing part, specifically a cage for receiving rolling bodies of a bearing. The body of the plastic part is essentially made of a radiation-crosslinkable plastic material. Pigments that undergo a visible change during the irradiation are mixed in with the plastic material. Also, a method is disclosed for producing a plastic part, especially a bearing part, specifically a cage for receiving rolling bodies of a bearing the plastic part that has a body made of a radiation-crosslinkable plastic material.

Abstract: A condensation reaction curable composition comprises a silyl phosphate catalyst, and a polyorganosiloxane polyoxyalkylene block copolymer having one or more polyorganosiloxane blocks and one or more polyoxyalkylene blocks linked to each other via divalent radicals which comprises at least two silicon-bonded alkoxy groups, preferably of the form PS-(A-PO)m-(A-PS)n, wherein PO is a polyoxyalkylene block, PS represents a polyorganosiloxane block, A is a divalent radical, subscripts m and n have independently a value of at least 1, comprising at least one alkoxy-substituted siloxane unit of the formula (R?)q(OR)—SiO3-q/2, wherein R represents an alkyl group having 1 to 4 carbon atoms and each R? represents an alkyl group having 1 to 6 carbon atoms, a phenyl group, or an alkoxy group of the formula —OR and subscript q has a value of 0, 1 or 2, provided at least two silicon-bonded groups OR are present in the block copolymer.

Abstract: This invention relates to adhesive systems using imines and salts thereof, precursors to electron deficient olefins and coreactants therefor.

Abstract: In various embodiments a urethane/molecular rebar formulation comprising a specific composition is disclosed. The composition comprises a urethane polymer or prepolymer/discrete carbon nanotube formulation. Utility of the urethane/molecular rebar composition includes improved foams and adhesives.

Abstract: An inkjet ink includes carbon nanotubes, flake graphites, an organic carrier, a binder, a surfactant, a film enhancer and a solvent. A method for making an inkjet ink includes dispersing the plurality of carbon nanotubes in the surfactant solvent to form a first mixture, dispersing the plurality of flake graphites in the organic carrier solvent to form a second mixture, adding the film enhancer into the second mixture to form a third mixture, and mixing the first mixture and the third mixture.

Abstract: Polymer-inorganic particle blends are incorporated into structures generally involving interfaces with additional materials that can be used advantageously for forming desirable devices. In some embodiments, the structures are optical structures, and the interfaces are optical interfaces. The different materials at the interface can have differences in index-of-refraction to yield desired optical properties at the interface. In some embodiments, structures are formed with periodic variations in index-of-refraction. In particular, photonic crystals can be formed. Suitable methods can be used to form the desired structures.

Abstract: The composition is applied in two or three parts. In a two part process, a sodium silicate/color mixture is first applied and allowed to dry. In a second part, an acid, lithium, or potassium lock-in solution is applied. In a three part application procedure, the first part is a sodium silicate mixed with a diluted water based acrylic stain of a desired color. The third part includes a sodium silicate based clear coat (with no color mixed in) that is applied over the color coat. A second part including the lock-in solution is applied over the third part clear coat.

Abstract: In one embodiment, an electrical power storage system using hydrogen includes a power generation unit generating power using hydrogen and oxidant gas and an electrolysis unit electrolyzing steam. The electrical power storage system includes a hydrogen storage unit storing hydrogen generated by the electrolysis and supplying the hydrogen to the power generation unit during power generation, a high-temperature heat storage unit storing high temperature heat generated accompanying the power generation and supplying the heat to the electrolysis unit during the electrolysis, and a low-temperature heat storage unit storing low-temperature heat, which is exchanged in the high-temperature heat storage unit and generating with this heat the steam supplied to the electrolysis unit.

Abstract: The invention relates to a polyamide moulding compound for producing moulded articles with a soft-touch surface, the polyamide moulding compound comprising a blend of an amine-terminated, amorphous polyamide and styrene-ethylene/butylene-styrene copolymer and also styrene-ethylene/butylene-styrene copolymer grafted with maleic anhydride. The invention relates furthermore to moulded articles which are produced with this moulding compound and the use thereof.

Abstract: The vulcanizable rubber mixture according to this invention is used for rubber products in particular vehicle tires and vehicle tire treads, but also technical rubber products like belts on conveyor systems, technical hoses, vibration dampers and impact dampers, or wire coatings. All these products benefit from the improved processability that is achieved with the invention in that the mixture comprises a polymer represented by the formula F1-A-F2, or a mixture of F1-A-F2 with an astral or radial coupling product of F1-A-units, coupled by a multivalent coupling agent; wherein F1 represents a terminal functionalization of the polymeric chain, F2 represents a terminal functionalization different from F1; and A represents the polymeric chain of a polymer formed by the copolymerization between one or more conjugated dienes with one or more aromatic vinyl monomers.

Abstract: A resin composition includes solid brominated epoxy resin of 20-70 wt %, a hardener of 1-10 wt %, a promoter of 0.1-10 wt %, inorganic powder of 0.01-20 wt %, high thermal conductivity powder of 5-85 wt % closest packed by Horsfield packing model and a processing aid of 0-10 wt %; the resin composition possesses high glass transition temperature ranged from 169° C. to 235° C. measured by DSC, high thermal conductivity ranged from 5.7 W/m·K to 14.2 W/m·K, and excellent heat resistance as well as flame retardancy. The resin composition, which acts as a dielectric layer of a printed circuit board so as to endow the PCB with high thermal conductivity, is a high thermal conductivity prepreg formed by retting or a high thermal conductivity coating formed by coating. As a result, prompt dissipation of heat generated by electronic components on the PCB is achievable so that service life and stability of the electronic components are improved.

Abstract: An acrylic fireproof coating comprised of constituents including water, styrene acrylic polymer, refined white dolomite #0, processed granite #70, processed white marble #90, calcium sulfate, silicon concentrate 10 percent, titanium dioxide, polyethylene glycol, butoxyethanol, light mineral spirits, #5 nano beads and phosphorus trichloride PCl 3. Also included is the method of preparing the acrylic fireproof coating.

Abstract: Composite products made with binder compositions that include one or more tannins, one or more multifunctional aldehydes, and one or more Lewis acids and methods for making same. The method can include contacting a plurality of substrates with the binder composition and at least partially curing the binder composition to produce a composite product. The one or more multifunctional aldehyde compounds can include (1) two or more carbon atoms and two or more aldehyde functional groups, or (2) two or more carbon atoms, at least one aldehyde functional group, and at least one functional group other than an aldehyde functional group. A carbon atom of at least one aldehyde functional group can have a first bond with a first tannin molecule and a second bond with (a) the first tannin molecule, (b) a second tannin molecule, or (c) an oxygen atom of the at least one aldehyde functional group.

Abstract: An intercalated layered silicate comprises a layered silicate and an intercalating agent sorbed between the silicate layers of the layered silicate. The amount of intercalating agent is effective to provide an average interlayer spacing between the silicate layers of at least about 20 ?. The intercalating agent has a formula selected from formulas I through VII described herein. The intercalated layered silicate may be exfoliated by mixing it with a matrix medium and adding sufficient energy to form a dispersed-particle composition. A packaging film, such as a food packaging film, may comprise the dispersed-particle composition.

Abstract: Filled polyamide molding materials, in particular polyamide molding materials with medium filler content, are producible from a polyamide blend and for example by compounding with chopped or endless fibers on two-screw extruders, and have a combination of reduced water absorption and good mechanical properties, which results in very good dimensional stability and reduced variation of the electrical properties of the produced molded part, such as an antenna housings of stationary or mobile communication devices. These thermoplastic polyamide molding materials are suitable for manufacturing molded parts and other semi-finished or finished parts, for example by extrusion, injection molding, pressing, direct process or direct compounding, respectively, wherein the compounded polyamide molding material is directly processed by injection molding or other shaping methods.

Abstract: Polyurethane gels are produced by converting a polyurethane system comprising (A1) one or more polyether alcohols of hydroxyl number 28 to 90 mg KOH/g produced primarily from propylene oxide added to a starter molecule of hydroxyl functionality between 2 and 4, (A2) one or more polyether alcohols of hydroxyl number 240 to 850 mg KOH/g produced primarily from propylene oxide added to a starter molecule of hydroxyl functionality between 2 and 4, (b1) one or more diisocyanates, (B2) one or more triisocyanates preferably produced by trimerisizing diisocyanates, (A3) at least one additive material fulfilling a prescribed function, and (A4) at least one additive material having a particle size in the range from 1 to 650 nm in the presence of one or more catalysts (A5) for forming polyurethane.

Abstract: In order to provide a curable casting compound for producing plastic molded parts, comprising a binder component based on polymerizable monomers selected from methyl acrylate or methyl methacrylate and a proportion of about 40 to about 85% by weight of one or more inorganic fillers, which compound can be used for producing plastic molded parts having an increased impact strength, it is proposed that the casting compound comprise 0.1 to 0.5% by weight of keratin fibers.

Abstract: The present invention relates to a high-performance silicone elastomer composition that is adhesive and that can be crosslinked at high temperature for the assembly of silicone-based substrates, both by platinum and peroxide catalysis, and that may lend itself to a strip conformation. The composition comprises at least one gum, one catalyst and one adhesion promoter of polyorganohydrogensiloxane type, the nature and the amount of said adhesion promoter having been chosen so that Si—H groups are in excess following the reaction for crosslinking the composition, so as to obtain a potential surface density of covalent Si— bonds with the silicone substrate to be bonded of at least one covalent Si— bond per 60 nm2.

Abstract: The present invention provides an inkjet ink composition including color material particles, a water soluble polymerizable compound, a water soluble silicate salt and water, which is excellent in ejection stability even in a case in which the ink composition is stopped from ejecting in the inkjet recording device and left alone for a certain period of time, and ejection of the ink composition is resumed thereafter, which has a good maintenance property, and in which abrasion resistance of images formed with the ink composition is excellent; an ink set including the inkjet ink composition; and an image forming method using the ink set.

Abstract: An etch-resistant composition is provided. The etch-resistant composition comprises a polymer and a first organic solvent. The polymer is prepared by copolymerizing a polymerization unit comprising styrene-based monomer(s) and acrylate-based monomer(s), and has a weight average molecular weight of at least about 35,000. Based on the total weight of the etch-resistant composition, the amount of the polymer is about 20.0 to about 60.0 wt % and the amount of the solvent is about 40.0 to about 80.0 wt %. The etch-resistant composition can be used for preparing a selective emitter of a solar cell.

Abstract: Crack and joint sealant and method, an embodiment of the crack and joint sealant having a composition that is both gray and meets certain ASTM standards.

Abstract: Desirable composites of polysiloxane polymers and inorganic nanoparticles can be formed based on the appropriate selection of the surface properties of the particles and the chemical properties of the polymer. High loadings of particles can be achieved with good dispersion through the polymer. The composites can have good optical properties. In some embodiments, the inorganic particles are substantially free of surface modification.